Y Gymraeg yn y Rhondda, Cytundeb Trefaldwyn 1267 a hanes dyfeisio y batri hydrogen sy'n cael sylw. The Treaty of Montgomery and the Welsh language in the Rhondda are discussed. Show more
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Y Gymraeg yn y Rhondda, Cytundeb Trefaldwyn 1267 a hanes dyfeisio y batri hydrogen sy'n cael sylw. The Treaty of Montgomery and the Welsh language in the Rhondda are discussed. Show more